feat: Add solo multi commits filter

- Add solo commits filter option to the context menu for commit selection.
- it will be useful for compare those branchs/tags/commits

Author: heartacker

src/Views/Histories.axaml.cs

@@ -413,6 +413,17 @@ private ContextMenu CreateContextMenuForMultipleCommits(ViewModels.Repository re
             menu.Items.Add(saveToPatch);
             menu.Items.Add(new MenuItem() { Header = "-" });
 
+            var soloCommits = new MenuItem();
+            soloCommits.Header = App.Text("CommitCM.SoloCommits");
+            soloCommits.Icon = App.CreateMenuIcon("Icons.LightOn");
+            soloCommits.Click += (_, e) =>
+            {
+                repo.SetSoloCommitFilterMode(selected, Models.FilterMode.Included);
+                e.Handled = true;
+            };
+            menu.Items.Add(soloCommits);
+            menu.Items.Add(new MenuItem() { Header = "-" });
+
             var copyShas = new MenuItem();
             copyShas.Header = App.Text("CommitCM.CopySHA");
             copyShas.Icon = App.CreateMenuIcon("Icons.Hash");